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Daylilies

Daylilies

Hemerocallis – species and hybrids

Garden Balcony Sun Partial shade PerennialEasy

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Profile

Plant group
Daylilies – species and garden hybrids
Growth & habit
Herbaceous clumps of leaf fans and fleshy roots; flowers stand on largely leafless scapes.
Foliage
Narrow, arching leaves. Many cultivars die back; others retain foliage in mild climates.
Family
Asphodel family (Asphodelaceae)
Origin
Species mainly from Asia; garden cultivars originate from breeding crosses.
Height
About 20–150 cm including flower scapes, depending on species and cultivar.
Bloom
Late spring to late summer depending on cultivar, sometimes with repeat flowering. Individual blooms usually open for one day.
Toxicity
Highly toxic to cats. Keep all plant parts and pollen away; seek immediate veterinary help after possible ingestion. Do not treat as an edible ornamental.

Care calendar

Flowering / flower development

  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec

Flowering depends on cultivar; each bloom usually lasts one day, with further buds following.

Guidance for Germany and Central Europe. Position, weather, species and cultivar shift these windows; indoor and container plants also depend on their winter conditions.

Your seasonal care plan

  • January

    Check winter drainage and frost-resistant pots; do not feed dormant plants.

  • February

    Remove dead leaves as new tips become visible; protect emerging growth.

  • March

    Plant or divide older clumps when the soil is workable.

  • April

    Water establishing plants in dry weather; assess nutrient need before feeding.

  • May

    Inspect buds for distortion; maintain even container moisture.

  • June

    Remove spent blooms and check water needs in hot weather.

  • July

    Follow the flowering sequence; remove scapes only after all flowers finish.

  • August

    Avoid drought stress; repeat flowering depends on cultivar and does not justify overfeeding.

  • September

    Divide and replant when needed; water in and support establishment.

  • October

    Allow foliage to die back; ensure winter drainage in pots.

  • November

    Protect vulnerable container roots and keep dead plant material away from cats.

  • December

    For dormant plants, correct waterlogged or completely dry pots only; no routine feeding.

  • Planting & division

    Mar · Apr · Sep · Oct

    Plant or divide older clumps when soil moisture is suitable.

Highlighted months are guidance, not fixed dates. Observe the plant, root ball and weather; water, feed and repot according to actual need.

Seasonal care intensity

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Seasonal guidance for Germany. Needs depend on location, weather and species. Check moisture in winter too; these markers are not a feeding schedule.

Peak care Active Reduced care

Care tips

  • Check cultivar and mature size before planting.
  • Monitor moisture and drainage.
  • Keep daylilies safely away from cats.

Plant knowledge at a glance

Position, benefits & character

Position & soil

Sun to partial shade in humus-rich, freely draining soil. Allow adequate root space in containers.

Distinctive features

Not true lilies and not bulb plants. Individual blooms are brief, while a clump can open buds over a longer period.

Benefits

Foliage structure and successive summer flowers in borders and large containers.

Partners & symbioses

Single flowers can provide food for flower visitors; value and accessibility vary by cultivar.

Pruning & growth habit

Cultivar choice determines space, flower height and spread. Keep vigorous species from overwhelming smaller neighbours.

  1. 1. Remove spent scapes

    Remove spent individual flowers. Cut a scape down only after all its blooms finish; retain green leaves.

  2. 2. Old foliage

    Remove dead foliage in late winter or as growth begins. Avoid cutting emerging leaf tips.

Nursery forms

This overview explains nursery supply forms. It does not indicate current availability in the GREEN24 shop.

Container-grown

Common form

Sold as a potted perennial, young plant or bare-root division. Check roots and leaf fans.

Young plant

Common form

Sold as a potted perennial, young plant or bare-root division. Check roots and leaf fans.

Bare-root

Common form

Sold as a potted perennial, young plant or bare-root division. Check roots and leaf fans.

Root-balled

Not typical for this profile

Not a standard woody or trunk form: daylilies are herbaceous perennials.

Shrub

Not typical for this profile

Not a standard woody or trunk form: daylilies are herbaceous perennials.

Feathered tree

Not typical for this profile

Not a standard woody or trunk form: daylilies are herbaceous perennials.

Half-standard

Not typical for this profile

Not a standard woody or trunk form: daylilies are herbaceous perennials.

Standard

Not typical for this profile

Not a standard woody or trunk form: daylilies are herbaceous perennials.

Topiary

Not typical for this profile

Not a standard woody or trunk form: daylilies are herbaceous perennials.

Propagation & grafting

Propagation

Divide older clumps in spring or autumn; each division needs healthy roots and leaf fans. Seed-grown offspring vary.

Grafting

Grafting is not a usual daylily propagation method.

Species & cultivars

Hemerocallis – Gartenhybriden

Choose by height, flowering season and flower form. Cultivar identity matters; photos do not replace a cultivar label.

Hemerocallis ‘Stella de Oro’

A familiar compact yellow-flowered cultivar; repeat flowering depends on conditions.

Hemerocallis ‘Catherine Woodbery’

An example with delicate lavender-pink flowers.

Pests & diseases

These signs support an initial assessment. Different causes may look alike; choose a treatment only after identifying the problem.

Distorted buds

Check swollen buds that fail to open for daylily gall midge and remove affected buds. Do not simply increase feed.

Few flowers

Check light, drought stress and clump age. Divide crowded clumps when needed.

Protect cats

Keep all plant parts, pollen and cut material away from cats. Seek immediate veterinary help after possible ingestion; do not wait for symptoms.

Hardiness · USDA

Usually hardy perennials; assess cultivar and cultivation

USDA describes regional winter minima, not frost safety in an exposed pot. Distinguish evergreen and deciduous cultivars; protect container roots from severe freezing.

Hemerocallis – Gattungsübersicht
NC State lists USDA 3a–9b. This is a genus-level range, not a guarantee for every cultivar or container position.

USDA zones describe long-term average winter extremes. Containers, young plants, wet soil, wind and late frost need separate consideration.

Understand USDA zones and maps →

A closer look

Daylilies in a perennial border
Growth habit

Daylilies in a perennial border

Generated, botanically reviewed example of Hemerocallis hybrids; no specific cultivar.

GREEN24

Botanical features vary with age, species and cultivar.

Matching GREEN24 products

Matching fertilisers and substrates for your plant care.